45-45-90 Right Triangle Diagram | Geometry Reference #1396256 (License: Personal Use)

This diagram illustrates an isosceles right triangle, also known as a 45-45-90 triangle, with two equal 45-degree angles at the base vertices and a right angle (90°) at the apex, marked by a square symbol. The congruent angles indicate equal opposite sides, a key property used in trigonometry and Pythagorean theorem applications.

Used in educational math content, geometry textbooks, online tutorials, and SAT/GRE prep materials to teach special right triangles, side ratios (√2:1:1), and angle-side relationships.